Yes

you do need a jacket based on the weather in Jamesburg, NJ 08831, USA 1 second ago

Why? Because it's quite chilly.
44°F7°C & Cloudy

Wind is 5 mph8 km/h from the SE, gusting to 12 mph20 km/h
April 25
10pm43°F6°C5 mph8 km/h SEPartly Cloudy
11pm41°F5°C3 mph5 km/h SEPartly Cloudy
April 26
12am39°F4°C3 mph4 km/h SClear
1am38°F3°C2 mph4 km/h NEClear
2am36°F2°C2 mph3 km/h NClear
3am35°F2°C2 mph3 km/h NClear
4am34°F1°C2 mph4 km/h NClear
5am34°F1°C3 mph4 km/h NClear
6am34°F1°C3 mph5 km/h NClear
7am36°F2°C3 mph5 km/h NEClear
8am42°F5°C3 mph5 km/h NEClear
9am48°F9°C4 mph7 km/h NEClear
DateLowHighWindDayNight
April 2539°F4°C58°F14°C4 mph6 km/h from EPartly CloudyMostly Clear
April 2633°F1°C63°F17°C6 mph9 km/h from EClearMostly Clear
April 2735°F2°C64°F18°C7 mph12 km/h from SMostly CloudyCloudy
April 2846°F8°C78°F25°C6 mph9 km/h from SWPartly CloudyPartly Cloudy
April 2958°F14°C86°F30°C5 mph7 km/h from NMostly CloudyPartly Cloudy
April 3052°F11°C75°F24°C8 mph13 km/h from SEPartly CloudyDrizzle
May 156°F13°C78°F25°C6 mph9 km/h from SWPartly CloudyPartly Cloudy

Yes

Low of 34°F1°C, High of 64°F18°C
Wind: 6 mph9 km/h
Precipitation: None

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